package com.wc.AlgoOJ_homework.AlOJ模块测试I.C_砝码称重;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

/**
 * @Author congge
 * @Date 2024/5/12 9:27
 * @description http://43.138.190.70:8888/p/193?tid=663e1b10d39d10926ed3f7fa
 */
public class Main {
    static FastReader sc = new FastReader();
    static PrintWriter out = new PrintWriter(System.out);
    static int N = 100010;
    static boolean[] st = new boolean[N];
    static boolean[] tmp = new boolean[N];
    static int[] a = new int[N];
    static int n;

    public static void main(String[] args) {
        n = sc.nextInt();
//        for(int i = 1; i <= n; i++) a[i] = (int)Math.pow(2, i - 1);
        st[0] = true;
        for (int i = 1; i <= n; i++) {
            int x = sc.nextInt();
//            int x = a[i];
            for (int j = 0; j < N; j++) {
                tmp[j] = st[j] | st[Math.abs(j - x)];
                if (j + x < N) tmp[j] |= st[j + x];
            }
            if (N >= 0) System.arraycopy(tmp, 0, st, 0, N);
        }
        int res = 0;
        for (int i = 1; i <= 100000; i++) {
            if (st[i]) res++;
        }
        out.println(res);
        out.flush();
    }
}

class FastReader {
    StringTokenizer st;
    BufferedReader br;

    FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }

    String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }

    int nextInt() {
        return Integer.parseInt(next());
    }

    String nextLine() {
        String s = "";
        try {
            s = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return s;
    }

    long nextLong() {
        return Long.parseLong(next());
    }

    double nextDouble() {
        return Double.parseDouble(next());
    }

    // 是否由下一个
    boolean hasNext() {
        while (st == null || !st.hasMoreTokens()) {
            try {
                String line = br.readLine();
                if (line == null)
                    return false;
                st = new StringTokenizer(line);
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return true;
    }
}
